23917708813 has 4 divisors (see below), whose sum is σ = 23918724828. Its totient is φ = 23916692800.

The previous prime is 23917708811. The next prime is 23917708853. The reversal of 23917708813 is 31880771932.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16014143209 + 7903565604 = 126547^2 + 88902^2 .

It is a cyclic number.

It is not a de Polignac number, because 23917708813 - 2¹ = 23917708811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23917708811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471838 + ... + 520063.

It is an arithmetic number, because the mean of its divisors is an integer number (5979681207).

Almost surely, 2^23917708813 is an apocalyptic number.

It is an amenable number.

23917708813 is a deficient number, since it is larger than the sum of its proper divisors (1016015).

23917708813 is an equidigital number, since it uses as much as digits as its factorization.

23917708813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016014.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 23917708813 in words is "twenty-three billion, nine hundred seventeen million, seven hundred eight thousand, eight hundred thirteen".